Electric switch.



G. B. THOMAS.

ELECTRIC SWITCH.

APPLICATION FILED 21m, 1910.

Patented Sept. 19, 1911.

{4, ATTORNEYS UNITED STATES PATENT OFFICE.

GEORGE 3. wireless, or immonron'n, connncggrcu'r, assrcnoit TO THE PERKINS ELECTRIC swrrcrr MANUFACTURING COMPANY, or BRIDGEPORT,-CONNECTICUT, A

CORPORATION OF CONNECTICUT.

ELECTRIC SWITCH.

Specification of Letters Patent. Patented Sept. 19, 1911. Application filed February 3, 1910. flerial No. 641,682.

To all whom it may concern:

Be it known that 1,, GEORGE B. TuoMAs, a citizen of the United States of America, and residing in the city of Bridgeport, in the county of Fairfield and State of Connecticut, have inventeda certain new and useful Im rovment in Electric Switches, of which he followin is a specification.

My invention re ates to electric switches and particularly pendent electric switches and t a compact and efficient device of'this charactor of novel and improved construction.

In the accompanying drawings, Fi ure 1 is a vertical section on lines 11, *ig. 3,'

through a pendent switch in which m in vention is embodied; F i 2 is a vertical scction through the porcelain shell alone on the line 2-2, Fi 3; Fig. 3 is a lan of the porcelain she I; Fig. 4: is a si e elevation of the switch mechanism of Fig. 1 showing the same in the on position; Fig. 5 is a perspective of this mechanism showing the parts detached; and Fig. 6 is a perspective of the wire and switch terminals detached.

In the form illustrated the )resent switch comprises a hollow porcelain ody A of the inverted cup type having its upper portion cut away to form inclined shoulders B and recessed on opposite sides to receive binding posts 10 beneath which are clamped 'the switch terminals 11. The latter project slightly through apertures a in the porcelain into the switch chamber within the porcelain where they may be engaged by the make and break switch piece, while the binding screw ends of the osts 10 are angled over the inclined shou ders of the porcelain thus minimizing the danger of wire finds finding their way Into the switch cham- The switch mechanism roper comprises a switch frame 12 with 0 set securin lug 13 adapted to enter the recess b in the lower portion of the switch chamber. The inset'c above the recess 6 together with the communicating hole between these, aifords a passage for the securing screw 14by means of which the frame is rigid] held in position. A switch member 15 o usual type oscillates on the switch s indie 16, which may be conveniently carried by the rocker 17 and secured on the opposite face of the frame 12 by washer 16. The legs 18 of the ope object of m invention is to rovidecratin spring are engaged as usual by legs 19 and 20 on the switch member and rocker res ectively.

nstead of pivoting the rocker to the pushbuttons .21 and 22 or connecting the same thereto by llnks as 18 common, rovlde a slidin connection through cross s ots 23 in the p ates 24 and 25, which the legs 20 0f the rocker enter. It is thus possible to ver-.

tically guide the plates by ln s 26, 27 struck up from the frame 12 (the ug 27 entering the slot 28 in the plate), and inasmuch as the push buttons are rigid therewith, they constantly maintain a or endicular position and do not tend to in in the holes in the shell S as is the case when they are pivoted to the rocker and are inclined from the perpendicular by the swinging of the rocker connection through an are. If desired, the lugs 20 of the rocker may be made of sufficient length to project throu h the plates 24, 25 and enter the guide s ots 30 formed in the frame; 1

The snap make and break of the switch is secured by the stop 29 on the switch member which engages the offset flange 31 on the plate 24, serving as a detent, By arranging this dctent about midway of the arc throng:

which the stop 29 moves and making t latter of suitable size, a ,single detent is made to perform the service commonly performed by two.

While the structure described is a sim-] gitudinal slot in said push plate, angled retaining lugs struck rom said frame and loosely embracing an edge of said ush plate whereby said push plate is guided rectilinearly, in combination with a rocker hav; ing a lug projecting into the transverse slot in said push late to form asliding' connection therewitli, s'ubstantiall as described.

2. In a push-switch mec ianism, a switch frame with securing flange offset atone end and a flange with guide apertures offset at the opposite end of said frame, in combinaate juxta-. I

tion with a push button with pu sh plate juxtaposed to said frame retaining guide lugs therefor on said frame to insure only a rectilinear movement for said push plate, and an extension on said plate entering the guide apertures in the flange offset from said frame, substantially as described.

3. In a push switch mechanism, a switch frame with curvilinear guide slot, a push button with transversely slotted push plate juxtaposed to said frame, said transverse slot in the push plate registering with the curvilinear guide slot in the switch frame, means for guiding said push plate rectilinearly on said frame, and a pivoted rocker having a lug passing through said transverse slot in the push plate and entering the slot in the switch frame.

4;. In push switch, a push button with push plate, a flange thereon serving as a detent, a switch member provided with a,

stop lug engaging said detent first on one side and then on the other, for the purpose described.

5. In a push switch a porcelain body of the inverted cup type with inclined shoulders and apertures opening into the upper portion of the switch chamber, together with switch terminals entering said apertures, and binding posts securing said terminals in position, the binding screw portion of said posts being angled over the inclined shoulder of the porcelain, as described,

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses.

GEORGE B. THOMAS.

Witnesses:

H. U. BADEAU, G. W Goomuoen. 

